How to restart network interface

Sometimes I need to restart the LAN network interface to refresh the DHCP/DNS assignment.

I prefer using host names in my network to access the boxes instead of using IP addresses. This sometimes the name resolution breaks e.g. after upgrade of an LE box. In this case a network interface restart helps.

AFAIK I used the following command to remotely restart the LAN interface

ifdown eth0 &&  ifup eth0

however it is not working in LE 8.2.2 on ARM boxes-

wetek:~ # ifdown eth0 &&  ifup eth0
ifdown: can't open '/etc/network/interfaces': No such file or directory

I suspect this was working before and probably the current behavior is a fault.

There is static DHCP reservation in the router with host name assignment. Regardless, the name resolution does not always work on Windows 10 machine.

The simple solution is the network interface restart. It worked before and does not work now. This is my problem.

OK.

Should ifdown and ifup commands work in Libreelec?

This command works fine.

ifconfig eth0 down && ifconfig eth0 up